[R] heatmap

[XinMeng]

Hello sir;
I use the function "heatmap.2" to draw a heatmap of microarray data,which consists of logratios.

Q1
But the lengend shows the Z score and the corresponding color.But I want the legend to show the logratios and the corresponding color.How can I do it?

Q1
How can I control that cluster only applied to genes(rows) or samples(columns) via heatmap.2 function?Default is cluster applied to both rows and columns.

Thanks a lot!

My best!